diff --git a/etl/collector.go b/etl/collector.go
index 0c3144c62..2dc7780fb 100644
--- a/etl/collector.go
+++ b/etl/collector.go
@@ -207,6 +207,11 @@ func (c *Collector) Load(db kv.RwTx, toBucket string, loadFunc LoadFunc, args Tr
 			}
 			return nil
 		}
+		if bucket == "PlainState" {
+			if len(v) == 0 {
+				fmt.Printf("etl load: empty val: %x, %x, %d, %t\n", k, v, c.bufType, v == nil)
+			}
+		}
 		if canUseAppend {
 			if isDupSort {
 				if err := cursor.(kv.RwCursorDupSort).AppendDup(k, v); err != nil {